-ey eee eeo eep ees eex eey eo- eoe eoo eop eos ep- epe epo epp eps epx es- ese eso esp ess esx esy ex- exe exo exp exs exx exy eye eyo eyp eys oee oeo oep oes oex oey oo- ooo oop oos oox op- ope opo opp ops opx opy os- ose oso osp oss osx ox- oxo oxx oxy oye oyo oys p-p pee peo pep pes pex pey poe poo pop pos pox poy ppe ppo ppp pps ppx ps- pse pso psp pss psx psy pxe pxs py- pye pyo pys pyx se- see seo sep ses sex sey soe soo sop sos sox soy spe spo spp sps spx spy ss- sse sso ssp sss ssx sxs sy- sye syp sys syx xee xep xes xex xoo xop xos xox xpe xpo xpp xps xsp xss xxo xxp xxx xxy xyp xyy yee yeo yep yes yex yey yoe yoo yop yos yox yoy ypo yps yse yso ysp yss ysy yxe yxy yye yys yyy